Graft having a pocket for receiving a stent and woven graft material forming a pocket

Abstract

A tubular graft for use in a stent graft. The tubular graft may include a first woven layer that forms a first side of the tubular graft, where the first woven layer has a set of first warp ends. A second woven layer may forma a second side of the tubular graft, where the second woven layer has a set of second warp ends, and where the second warp ends are distinct from the first warp ends. A woven pocket flap may extend from the first woven layer, where a pocket opening is defined between the woven pocket flap and the first woven layer, and where the woven pocket flap includes at least one common weft yarn with the first woven layer.

Description

BACKGROUND[0001]Aneurysms occur in blood vessels in locations where, due to age, disease or genetic predisposition, the blood vessel strength or resiliency is insufficient to enable the blood vessel wall to retain its shape as blood flows therethrough, resulting in a ballooning or stretching of the blood vessel at the limited strength / resiliency location to thereby form an aneurysmal sac. If the aneurysm is left untreated, the blood vessel wall may continue to expand, to the point where the remaining strength of the blood vessel wall is below that necessary to prevent rupture, and the blood vessel will fail at the aneurysm location, often with fatal result.[0002]To prevent rupture, a stent graft of a tubular construction may be introduced into the blood vessel, for example intraluminally. Typically, the stent graft is deployed and secured in a location within the blood vessel such that the stent graft spans the aneurysmal sac. The outer surface of the stent graft, at its opposed end...

AI Technical Summary

Benefits of technology

The present disclosure describes a tubular graft for use in a stent graft, which includes a first woven layer with first warp ends, a second woven layer with second warp ends, and a woven pocket flap extending from the first woven layer with at least one common weft yarn. The graft also includes a stent graft with a stent and the tubular graft. The method for forming the tubular graft involves weaving the first and second woven layers and the pocket flap. The technical effects of this invention include improved patent text describes a new type of tubular graft for use in a stent graft. This graft has a unique design with two layers of woven material and a pocket flap that helps to secure the graft to the stent. This design helps to improve the strength and flexibility of the stent graft, making it more durable and better suited for use in various medical procedures.

Problems solved by technology

Aneurysms occur in blood vessels in locations where, due to age, disease or genetic predisposition, the blood vessel strength or resiliency is insufficient to enable the blood vessel wall to retain its shape as blood flows therethrough, resulting in a ballooning or stretching of the blood vessel at the limited strength / resiliency location to thereby form an aneurysmal sac.

If the aneurysm is left untreated, the blood vessel wall may continue to expand, to the point where the remaining strength of the blood vessel wall is below that necessary to prevent rupture, and the blood vessel will fail at the aneurysm location, often with fatal result.

While tubular stent grafts have been used with success, manufacturing processes remain inefficient and improved connections between the stent and graft body are desired.

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